US7054671B2 - Antenna arrangement in a mobile station - Google Patents
Antenna arrangement in a mobile station Download PDFInfo
- Publication number
- US7054671B2 US7054671B2 US09/960,422 US96042201A US7054671B2 US 7054671 B2 US7054671 B2 US 7054671B2 US 96042201 A US96042201 A US 96042201A US 7054671 B2 US7054671 B2 US 7054671B2
- Authority
- US
- United States
- Prior art keywords
- wired board
- printed wired
- area
- ground plane
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime, expires
Links
- 239000000463 material Substances 0.000 claims abstract description 52
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 4
- 239000003302 ferromagnetic material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 description 11
- 230000005294 ferromagnetic effect Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000005291 magnetic effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
- H05K1/023—Reduction of cross-talk, noise or electromagnetic interference using auxiliary mounted passive components or auxiliary substances
- H05K1/0233—Filters, inductors or a magnetic substance
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/245—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
Definitions
- the invention concerns generally the technological field of antenna arrangements and EMC (ElectroMagnetic Compatibility) arrangements in mobile stations. Especially the invention concerns decreasing effects of RF radiation of the antenna in electronics of mobile stations. The invention also concerns a mobile station equipped with such an antenna arrangement.
- FIG. 1 illustrates a cross section of a typical mobile station according to the prior art.
- the mobile station 100 has a helix antenna 101 which is connected to the printed wired board 103 together with other electronics 102 .
- the battery 105 of the mobile station forms a part of the housing 104 .
- Patent document [1] U.S. Pat. No. 5,787,340 discloses an arrangement where a shelding layer is located beside the user and an antenna. Such a shielding layer is illustrated in FIG. 1 as 120 .
- article [2] “Reduction of SAR in Human Head by Suppression of Surface Currents due to a Portable Telephone” by J. Wang and O. Gujiwara, IEICE Trans. Commun., vol. E80-B, pp. 1810–1815.
- This article discloses an arrangement with low reluctance ferrite sheet disposed on the housing of a portable telephone.
- Patent document [3] U.S. Pat. No. 5,982,335 discloses a a microstrip antenna with a ground plane, microstrip radiator and a substrate disposed between the radiator and the ground plane. Theory of microstrip antennas is also described in [4] “Small Antennas” ISBN 086380 048 3, pages 138–165.
- the dielectric substrate of a microstrip antenna takes a lot of space within the housing of the mobile station, and therefore the size of the housing would become too large, or the space available for other electronics would become too small.
- Another drawback is the fact that while the antenna would be located just next to the electronics circuits, the radiation of the antenna could cause RF interference to the electronics.
- the low magnetic reluctance material on the surface of the ground plane affects the radiation pattern of the antenna by, for example, attenuating the radiation intensity in the direction opposite to the radiator.
- a microstrip antenna tends to cause high radiation intensity in small areas in the nearest surrounding area of the antenna.
- a further drawback is related to the fact that it is difficult to connect a microstrip antenna to the RF electronics of a mobile station.
- the antenna element must first be equipped with connecting wires, next the printed wired board must and the antenna element must be installed within the housing, and finally the antenna wires must be soldered to the printed wired board. It is quite difficult to arrange these production phases within an automated production line, and thus manual assembly work may be required.
- the planar antenna has preferably an air gap between the radiator plate and the ground plane.
- a sheet of low reluctance material for absorbing the RF radiation.
- the sheet of low reluctance material is so located that it covers an area of the printed wired board which is not covered by the radiator element or the ground plane of the planar antenna.
- the low reluctance material covers a high RF intensity area on the printed wired board. This means that the low reluctance material is placed on side of the planar antenna.
- the low reluctance material is also preferably located at least partly at the same area of the printed wired board as the display unit of the mobile station, such as between the display unit and the printed wired board.
- the low reluctance material is preferably ferromagnetic material, such as flexible sheet of ferromagnetic material, and it is may be attached to the display unit or on the PWB.
- the present invention has several important advantages over the prior art solutions. With the present invention it is possible effectively reduce the interference of the antenna's RF radiation to other electronics of a mobile station, because the low reluctance material effectively reduces the RF currents on the surface of the printed wired board.
- the antenna arrangement also has a radiaton pattern that directs the radiation away from the user and thus makes the antenna efficiency high.
- the antenna is constructed above the printed wired board it is possible to use the antenna area of the PWB also for other electronic components and/or wiring. Therefore it is possible to make the size of the mobile station very small.
- Many possibilities are available for attaching the ferromagnetic sheet to the display unit or the PWB, because the attachment means do not affect the performance of the antenna. Advantages can be achieved by locating the low reluctance material at least partly between the display unit and the printed wired board.
- the area of the display unit is relatively large and therefoire it is possible to place a ferromagnetic sheet with large area below the display unit.
- the wiring between the display unit and the PWB can be arranged to the edge of the display unit, and therefore the ferromagnetic sheet can be uniform. On the whole, the arrangement according to the present invention is extremely well suited for mass production, because all assembly phases can be provided on a single PWB assembly line.
- the antenna arrangement of a mobile station according to the invention comprises
- the invention applies also to a mobile station, comprising:
- FIG. 1 illustrates an cross section view of a prior art mobile station
- FIG. 2 illustrates an examplary antenna arrangement according to the invention
- FIG. 3 illustrates a perspective view of an examplary antenna arrangement according to the invention
- FIG. 4 illustrates a cross section view of a mobile station with an examplary antenna arrangement according to the invention
- FIG. 5 illustrates an assembly diagram of an examplary mobile station according to the invention.
- FIG. 1 was already described in the prior art section above.
- FIG. 2 illustrates a cross section of an exemplary antenna arrangement according to the present invention. It comprises a ground plane 218 on a printed wired board 234 , and a radiator element 216 which is connected to the ground plane from its edge, 219 .
- the radiator element is substantially parallel with the ground plane and the printed wired board, and there is an air gap between the radiator element and the ground plate.
- the feed point of the radiator element is connected with a pin 212 to a printed wire of the PWB which is further connected to RF circuits 241 such as a duplex filter etc.
- ground plate and the radiator element of the planar antenna are located at the end of a printed wired board. Further details regarding planar inverted-L or -F antennas may be found in [5] “Small Antennas” ISBN 086380 048 3, pages 116–137.
- the low reluctance material is, e.g. a sheet of ferromagnetic sheet.
- the low reluctance material is located further from the end of the printed wired board, between a display unit and the printed wired board.
- the display unit comprises a light guide or element with similar functionality 208 a for providing illumination, and an LCD (Liquid Crystal Display) 208 b .
- FIG. 2 also shows other electronics components 242 and an area 250 where the intensity of the RF currents would be relatively high if the low reluctance material 245 according to the present invention would not be applied.
- FIG. 3 illustrates a perspective view of an examplary antenna arrangement according to the present invention.
- the radiator element 316 is connected to the ground plane 318 from its other edge 319 .
- the FIG. 3 also shows the feed pin 312 .
- the radiator element 316 covers the same area of the printed wired board as the ground plane 318 .
- a ferromagnetic sheet 345 is applied on the other side of the printed wired board.
- the ferromagnetic sheet is located between the printed wired board 334 and a light guide 308 a of the display unit which also includes an LCD 308 b .
- the ferromagnetic sheet 345 covers an area 346 of the printed wired board. In this case, the area 346 does not overlap with the area 318 .
- FIG. 3 shows an area 350 where the intensity of the RF radiation would be relatively high if the low reluctance material 345 according to the present invention would not be applied.
- FIG. 3 also illustrates some other electronics components 342 on the PW
- FIG. 4 illustrates a cross section of an examplary mobile station which has an antenna arrangement according to the present invention.
- the antenna comprises a radiator element 416 and a ground plane 418 which is made of a metal layer of the PWB.
- the ferromagnetic sheet is located between the display unit and the PWB.
- the display unit consists of a light guide 408 a and 408 b.
- FIG. 4 also shows the cover 404 , the battery 405 , the microphone 406 , the keyboard 407 and the earpiece and other electronic components 442 of the mobile station. These parts of the mobile station are similar to the prior art solution as illustrated in FIG. 1 .
- FIG. 5 illustrates an assembly diagram of an examplary mobile station according to the present invention.
- the planar antenna comprises a radiator 516 which is attached to the printed wired board with a plastic frame 519 .
- the frame serves as a support and keeps the radiator element on a fixed distance from the ground plate 518 .
- the sheet of low reluctance material 545 is attached to the light guide 508 a of the display unit using a clip 548 .
- the clip keeps the sheet of eg. ferromagnetic sheet firmly in place.
- These parts are then attached to the printed wired board together with the LCD 508 b by eg. using a frame 508 c .
- Another possibility to attach the low reluctance material is attaching the sheet on the printed wired board by eg. gluing.
- FIG. 5 also shows some other parts of the mobile station; keyboard 572 – 575 , microphone 506 , cover 504 , battery 505 and other electronics components 542 .
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Telephone Set Structure (AREA)
- Support Of Aerials (AREA)
- Details Of Aerials (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
-
- a planar antenna including a ground plane and a planar radiator element which is disposed substantially parallel to the ground plane, and
- a printed wired board which is located substantially parallel to said ground plane and said radiator element, wherein the ground plane covers a first area on the printed wired board and the radiator element covers a second area on the printed wired board.
-
- the arrangement comprises a layer of low reluctance material which layer is substantially parallel to the printed wired board and covers a third area on the printed wired board, and
- said layer of low reluctance material is so located that the third area on the printed wired board is at least in part outside said first and second areas on the printed wired board.
-
- a planar antenna including a ground plane and a planar radiator element which is disposed substantially parallel to the ground plane, and
- a printed wired board which is substantially parallel to said ground plane and said radiator element, wherein the ground plane covers a first area on the printed wired board and the radiator element covers a second area on the printed wired board.
-
- the mobile station further comprises a layer of low reluctance material which layer is substantially parallel to the printed wired board and covers a third area on the printed wired board, and
- said layer of low reluctance material is so located that the third area on the printed wired board is at least in part outside said first and second areas of the printed wired board.
Claims (22)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20002123A FI20002123A (en) | 2000-09-27 | 2000-09-27 | Mobile antenna arrangement |
FI20002123 | 2000-09-27 |
Publications (2)
Publication Number | Publication Date |
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US20020037757A1 US20020037757A1 (en) | 2002-03-28 |
US7054671B2 true US7054671B2 (en) | 2006-05-30 |
Family
ID=8559168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/960,422 Expired - Lifetime US7054671B2 (en) | 2000-09-27 | 2001-09-21 | Antenna arrangement in a mobile station |
Country Status (5)
Country | Link |
---|---|
US (1) | US7054671B2 (en) |
EP (1) | EP1195843B1 (en) |
DE (1) | DE60124196T2 (en) |
FI (1) | FI20002123A (en) |
IL (1) | IL144652A (en) |
Cited By (33)
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US20060208951A1 (en) * | 2003-10-09 | 2006-09-21 | Lk Products Oy | Cover structure for a radio device |
US8466756B2 (en) | 2007-04-19 | 2013-06-18 | Pulse Finland Oy | Methods and apparatus for matching an antenna |
US8473017B2 (en) | 2005-10-14 | 2013-06-25 | Pulse Finland Oy | Adjustable antenna and methods |
US8564485B2 (en) | 2005-07-25 | 2013-10-22 | Pulse Finland Oy | Adjustable multiband antenna and methods |
US8618990B2 (en) | 2011-04-13 | 2013-12-31 | Pulse Finland Oy | Wideband antenna and methods |
US8629813B2 (en) | 2007-08-30 | 2014-01-14 | Pusle Finland Oy | Adjustable multi-band antenna and methods |
US8648752B2 (en) | 2011-02-11 | 2014-02-11 | Pulse Finland Oy | Chassis-excited antenna apparatus and methods |
US8786499B2 (en) | 2005-10-03 | 2014-07-22 | Pulse Finland Oy | Multiband antenna system and methods |
US8847833B2 (en) | 2009-12-29 | 2014-09-30 | Pulse Finland Oy | Loop resonator apparatus and methods for enhanced field control |
US8866689B2 (en) | 2011-07-07 | 2014-10-21 | Pulse Finland Oy | Multi-band antenna and methods for long term evolution wireless system |
US8988296B2 (en) | 2012-04-04 | 2015-03-24 | Pulse Finland Oy | Compact polarized antenna and methods |
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US9203154B2 (en) | 2011-01-25 | 2015-12-01 | Pulse Finland Oy | Multi-resonance antenna, antenna module, radio device and methods |
US9246210B2 (en) | 2010-02-18 | 2016-01-26 | Pulse Finland Oy | Antenna with cover radiator and methods |
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US9406998B2 (en) | 2010-04-21 | 2016-08-02 | Pulse Finland Oy | Distributed multiband antenna and methods |
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US9590308B2 (en) | 2013-12-03 | 2017-03-07 | Pulse Electronics, Inc. | Reduced surface area antenna apparatus and mobile communications devices incorporating the same |
US9634383B2 (en) | 2013-06-26 | 2017-04-25 | Pulse Finland Oy | Galvanically separated non-interacting antenna sector apparatus and methods |
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Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100548204B1 (en) * | 2002-11-19 | 2006-02-02 | 삼성전자주식회사 | a planner inverted F antenna apparatus of a wireless communication device and a ??? using this antenna |
GB0310656D0 (en) * | 2003-05-09 | 2003-06-11 | Koninkl Philips Electronics Nv | Radio communications device |
KR100625121B1 (en) * | 2003-07-01 | 2006-09-19 | 에스케이 텔레콤주식회사 | Method and Apparatus for Reducing SAR Exposure in a Communication Handset Device |
DE10339900A1 (en) * | 2003-08-29 | 2005-04-07 | Siemens Ag | Mobile communication device |
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JP4858733B1 (en) * | 2010-10-06 | 2012-01-18 | 横浜ゴム株式会社 | Transmitter |
US8270929B1 (en) * | 2011-09-09 | 2012-09-18 | Contech RF Devices, LLC | RF shielding for mobile devices |
CN105655683B (en) * | 2014-12-03 | 2019-04-26 | 联想(北京)有限公司 | A kind of antenna circuit structure |
Citations (18)
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JPH04220851A (en) | 1990-12-21 | 1992-08-11 | Mitsubishi Electric Corp | Cordless telephone set |
US5491301A (en) * | 1992-12-28 | 1996-02-13 | Hitachi, Ltd. | Shielding method and circuit board employing the same |
US5493704A (en) | 1992-12-17 | 1996-02-20 | Alcatel N.V. | Portable communications transmitter |
US5507012A (en) | 1993-03-17 | 1996-04-09 | Luxon; Kevin N. | Shield apparatus for absorbing microwave energy for hand held telephones |
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WO1997017792A1 (en) | 1993-04-05 | 1997-05-15 | Crowley Robert J | Antenna transmission coupling arrangement |
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US5945954A (en) * | 1998-01-16 | 1999-08-31 | Rangestar International Corporation | Antenna assembly for telecommunication devices |
US5949376A (en) * | 1997-07-29 | 1999-09-07 | Alcatel Alsthom Compagnie Generale D'electricite | Dual polarization patch antenna |
US5982335A (en) * | 1997-09-25 | 1999-11-09 | Motorola, Inc. | Antenna with low reluctance material positioned to influence radiation pattern |
JP2000196282A (en) | 1998-12-24 | 2000-07-14 | Tokin Corp | Electronic circuit device and portable telephone mounting the same and simplified portable telephone |
US6114996A (en) * | 1997-03-31 | 2000-09-05 | Qualcomm Incorporated | Increased bandwidth patch antenna |
US6121931A (en) * | 1996-07-04 | 2000-09-19 | Skygate International Technology Nv | Planar dual-frequency array antenna |
US6421016B1 (en) * | 2000-10-23 | 2002-07-16 | Motorola, Inc. | Antenna system with channeled RF currents |
US6531985B1 (en) * | 2000-08-14 | 2003-03-11 | 3Com Corporation | Integrated laptop antenna using two or more antennas |
US6580397B2 (en) * | 2000-10-27 | 2003-06-17 | Telefonaktiebolaget L M Ericsson (Publ) | Arrangement for a mobile terminal |
-
2000
- 2000-09-27 FI FI20002123A patent/FI20002123A/en unknown
-
2001
- 2001-07-31 IL IL14465201A patent/IL144652A/en not_active IP Right Cessation
- 2001-09-21 US US09/960,422 patent/US7054671B2/en not_active Expired - Lifetime
- 2001-09-27 DE DE60124196T patent/DE60124196T2/en not_active Expired - Lifetime
- 2001-09-27 EP EP01000505A patent/EP1195843B1/en not_active Expired - Lifetime
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Title |
---|
"Reduction Of SAR In Human Head By Suppression Of Surface Currents Due To A Portable Telephone", Wang et al., IEICE Trans, Commun., vol. E80-B. |
"Small Antennas" ISBN 086380 0483, pp. 116-137 and 138-165. |
Japanese Patent document No. JP 2000101338. |
Cited By (36)
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---|---|---|---|---|
US20060208951A1 (en) * | 2003-10-09 | 2006-09-21 | Lk Products Oy | Cover structure for a radio device |
US7340286B2 (en) * | 2003-10-09 | 2008-03-04 | Lk Products Oy | Cover structure for a radio device |
US8564485B2 (en) | 2005-07-25 | 2013-10-22 | Pulse Finland Oy | Adjustable multiband antenna and methods |
US8786499B2 (en) | 2005-10-03 | 2014-07-22 | Pulse Finland Oy | Multiband antenna system and methods |
US8473017B2 (en) | 2005-10-14 | 2013-06-25 | Pulse Finland Oy | Adjustable antenna and methods |
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Also Published As
Publication number | Publication date |
---|---|
FI20002123A (en) | 2002-03-28 |
DE60124196T2 (en) | 2007-09-06 |
US20020037757A1 (en) | 2002-03-28 |
IL144652A (en) | 2005-07-25 |
FI20002123A0 (en) | 2000-09-27 |
EP1195843B1 (en) | 2006-11-02 |
IL144652A0 (en) | 2002-05-23 |
EP1195843A3 (en) | 2003-11-05 |
EP1195843A2 (en) | 2002-04-10 |
DE60124196D1 (en) | 2006-12-14 |
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